Electrical condenser



Sept 15, 1936. HEYMAN 2,U54,478

ELECTRICAL CONDENSER Original Filed March 24, 1932 INVENTOR 8am, {lg/mamBY ATTORNEYS H Patented Sept. 15, 1936 UNITED STATES PATENT OFFICEELECTRICAL CONDENSER Original application March 24, 1932, Serial No.

Divided and this application February 15, 1935, Serial No. 6,668

3 Claims.

My present invention is particularly concerned with condensers of thecharacter in which a condenser stack together with its terminalstructures are completely embedded in a molded body of insulatingmaterial with portions of the terminals protruding beyond the insulatingmaterial for connection in electrical circuits.

An object of the invention is to provide a condenser of this characterin which the size of the molded casing is reduced to a minimum withrespect to the size of the condenser stack embedded therein.

Another object is to provide a construction in which proper andeffective electrical contact between the armatures of. the stack and theterminals of the condenser is assured.

Another object is to provide terminal extensions or lead-outs which maybe conveniently and expeditiously connected in electrical circuits, evenwhere but little space is available for the introduction of a condenser.Said terminal ends furthermore are preferably sufliciently strong toactually support the weight of the condenser proper, even though thecondenser be disposed some distance from the point of juncture of saidterminal connection with the bus bars or wires or instruments of thecircuit.

Another object is to provide a molded condenser having long strongbendable terminal extensions or shanks projecting beyond the molded,stack-encasing body and integral with the terminal head which engagesthe armatures of the condenser stack, whereby completely to obviate theneed for secondary or intermediate electrical and mechanical connectionsbetween the projecting terminal shanks and the stack engaging terminalheads.

Another object is to provide a terminal including a portion capable offirmly embracing a condenser stack while making contact with thearmatures thereof at a plurality of points, all parts of the terminal,however, being integral whereby firm electrical contact at any pointassures establishing a good electrical contact between the condenserstack and the terminal clamp.

The present application is a division of my prior case, Serial No.600,876, filed March 24, 1932.

In the accompanying drawing in which is shown one of various possibleembodiments of the several features of the invention,

Fig. 1 is aperspective view of the condenser terminal,

Fig. 2 is a perspective view of the condenser showing the molded casingin phantom view,

Fig. 3 is a transverse sectional view taken on line 3-3 of Fig. 2, and

Fig. 4 is a perspective view of the complete condenser.

Referring now to the drawing, the condenser 5 unit is of conventionalform, preferably a stack of alternate sheets of mica l0 and foil II. Themica sheets are of the same size and aligned in a vertical stack, whilethe foils protrude alternately from the opposite ends of the stack,their extremities being turned over respectively at l2 and I3, forconnection to the terminals now to be described.

Each terminal is preferably made of a unitary length of wire, conformedas a rectangular frame or sleeve. By use of an appropriate windingmachine, the wire is wound into a plurality of convolutions l4rectangular in con our, with the successive convolutions preferably inlateral engagement with each other, as shown, one extremity l5 of one ofthe wires preferably being at the end of the extreme convolution M andthe other extremity of the wire I6 protruding as shown, generally atright angles outward from the middle of one side of the wire frame.

The convolute wire frame or sleeve is preferably of length slightlygreater than the Width of the condenser stack and of height slightlygreater than the thickness of said stack, so that it may be readilyslipped over the end of the stack without excessive friction ormutilation of the inturned foil ends I2 and I3. The device is thensubjected to pressure, by a plunger (not shown) of width slightly lessthan the width of the stack and properly centered with respect thereto,to depress the upper runs of the wire loops, making up the terminalframe or sleeve, as best shown in Fig. 3, for snug mechanical andelectrical contact with the infolded foil ends, thereby leaving shallowupstanding loops ll and I8 between the sides of the frame and thedepressed portions l9 thereof.

The condenser with its terminals is now preferably embedded in a moldedplastic composition such as bakelite shown at 20, which completelyencloses the condenser stack and its terminal frames and from oppositeends of which protrude the wire ends l6 serving for external terminalconnection of the condenser.

It will thus be seen that there is herein described apparatus in whichthe several features of this invention are embodied, and which apparatusin its action attains the various objects of the invention and is wellsuited to meet the requirements of practical use.

As many changes could be made in the above construction and manyapparently widely difierent embodiments of this invention could be madewithout departing from the scope thereof, it is intended that all mattercontained in the above a condenser stack,'the head comprising a sleeveportion and formed by a plurality of laterally contiguous loops of wire,each loop completely to encircle a condenser stack.

.2. A terminal for condensers comprising a single length of wire, oneend of which constitutes an elongated handle, the other end of the wirebeing bent into form to define a head rectangular in contour, the headcomprising a sleeve portion with one side compressible into clampingengagement with a condenser stack to be encircled thereby, said sleeveportion constituting a plurality of laterally contacting loops of wire.

3. A terminal for condensers comprising a single length of wire, one endof which constitutes an elongated handle, the other end of the wirebeing bent into form to define a head generally rectangular in contour,said head being formed with shallow upstanding loops extending thelength of a pair of parallel edges thereof, the length and width of saidhead between said shallow loops being depressed relative to the crestsof said loops.

SAM HEYMAN.

